Electric switch



Oct, 25,1927.

J. G.LUSB Y ELECTRIC SWITCH Filed March 16, 1927 Patented Oct. 25, 1927.

301m GEORGE LUS Y. or HARRISBURG, PENNSY VANIA.

, ELECTRIC SWITCH.

' "Application filed March 16, 1927. Serial No. 175,810.

This invention hasfor an vision of novel mea-ns for cutting out apparatus operated by an electric current, such as lights or telephones from the line wires of an electric system when a door of a cabinet or room containing the apparatus is closed,"in orderto interrupt the circuit and prevent damage to the apparatus from'lightning which might reach the-apparatus and lo burnit out; p

It is an object of this invention to provide novel switch operating means effective to establish a circuit whena door of a room or cabinet'containing apparatus, as aforesaid, is open, thereby making the apparatus accessible to users, the invention including novel means for operating a. switch not only when the. door is opened, but for breaking or interrupting the circuit when the door is closed, as stated.

It is a further object of this invention to produce aswitch and operating mechanism associated with the door of a room or cabinet in which the switch is located, the same including in two directions when the door is manipu- V lated, that is to say, for opening the switch when the door is closed, and for closing the switch when the door is open. I i

A still further object of this invention is to produce means of simple character which will withstand manipulation incident to the use of the room or cabinet containing the electric apparatus and the mechanism associatedwith it, the said device having the further function of limiting the ,outward swinging movement of the door of the room or cabinet in order that straining of its hinges will be obviated.

\Vith the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more.

fully set forth and claimed. V In describing the inveniton in detail, reference will be had to the accompanying drawings forming part of this application wherein like characters denote corresponding parts in the several views, and in whichp Figure 1 illustrates a view in elevation of i a fragment of acabinet with a device embodying the invention applied thereto;v Figure 2 illustrates a sectional view thereof; and

object the novel means for moving the switch F1gure3 illustrates a sectional view lookmg upwardly. when the door is open.

In these drawings, 5 denotes a cabinet or boxintended to contain a telephone, 6 a door hingedly connect-ed to the cabinet and adapted to close when the apparatus is notin use. As the apparatus such as atelephone or signalling device maybe of any conventional type,no attempt will be made to illustrate or describesame, but it is to be understood that the apparatus .is to be electrically connected toconductors over. which electricity shall travel. 1 r

Av switch 7 of the knife type, in the present embodiment of the invention, is installed in the cabinet and wires 8 will be connected to the poles of the switch, whereas other wires (not shown) will be connected to the terminals 9 of the switch. While the invention will be described in connection with a switch having plural contacts, the in- I ventor does not wish to be limited with.re- V spect to this phase of the invention. The blades 10 of the switch are connected to an arm 11 and the said arm has a curved por-: tion 12 constituting a camming surface which is intended to ride on a wear plate 13 on the door 14: when the door is closed, as the switch is to ,be moved to interrupt the circuit.

It will be apparent from an inspection of Figs. 2 and 3 that if the door is forced to a closed position in the direction of the arrow shown in Fig. 3, the wear plate will engage the camming surface of the arm and further movement of the door toward closing it will result in imparting motion to the switch blades and theyqwill be carried to the position shown inFig. 2 when the switch will be open. f

As a -means for reestablishing circuit throughthe switch when the door is open, a flexible element 15, such as a chain, cable, or the like, has one of its ends connected to the arm and its opposite end to an anchor 17 1 exerts a pull on the swltch when the door is open and serves to close the switch as the parts are shown in thepresent embodiment.

of the invention. It'is apparent, therefore,

. that the manipulatlon of the door in opening ating in conjunction with the said posts for opening and closing a circuit therethrough, an arm for the said blade, sald arm having a curved edge, a door for the cabinet, a wear plate on the door adapted to engage the curved surface of the arm of the switch and operative to open the switch, and'a flexible element connected to the arm and having one end anchored to the door.

2. In a cabinet, a switch therein having connections for electrical conductors, an arm forming a part of a switch element project- I ing from the cabinet in the pathof travel of a'door, a door forminga part of the cabinet and hingedly mounted for opening and 010s ing the cabinet, a wear plate on the door engaging the arm when the door is closing and operative to interrupt current through the switch, and a flexible element connected to the arm and having one end anchored to the door.

3. In a cabinet, a switch therein compris-r ing elements adapted to close and open a circuit, an arm forming a part of the movable portion of the switch, said arm projecting beyond the cabinet, a door for the cabinet, thesaid arm being in the'path of travel of the door whereby-a switch element is 'Inoved in one direction, a flexible element connecting the door to the arm, and a flexible element connected to the door and to of thecabinet.

7 JOHN GEORGE L 'sB Y.

an anchor 

